Means for making infusions



No. 607,352. Patented lul lz, I898.

1. s. DUNLAP.

MEANS FOR MAKING INFUSIONS.

(Application filed June 7, 1897.)

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Patented July I2, I898.

.l. S. DUNLAP. MEANS FOR MAKING lNFUSlONS.

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JOHN S. DUNLAP, OF CHICAGO, ILLINOIS.

MEANS FOR MAKING INFUSIONS.

SPECIFICATION forming part of Letters Patent No. 607,352, dated July 12,1898.

Application fil d June 7,1397. Serial No. 639,695. (No model.)

To (tZZ whom, it may concern:

Be it known that I, JOHN S. DUNLAP, a citizen of the United States ofAmerica, residing at Chicago, county of Cook, and State of Illinois,have invented certain new and useful Improvements in Means for MakingInfusions, of which the following is a description.

Referring to the accompanying drawings, wherein likereference-lettersindicate like or corresponding parts, Figure 1 is adiagram showing the preferred manner of employing a plurality of myimproved vessels. Fig. 2 is a vertical section of myimprovement with thepreferred. connections; Fig 3, a top plan of the jacket-heater or drum;Fig. 4, a section in line i 4 of Fig; 2, and Fig. 5 a sectional view ofa modification.

This invention is in the nature of an adaptation of the invention incofiee-pots and similar vessels patented to me'May 11, 1897, No.582,188, to a more extended use than is there described, and also to theuse of steam or hot water for the heating medium inthe use thereof.

To this end it consists, broadly, in the combination of a vessel of thetype there described with a steam or hot-water drum so positioned thatthe fluid in the vertical pipe shall be more rapidly heated than that inthe vessel itself, whereby the circulation and operation described aresatisfactorily secured.

It also consists in thecombination of a plurality of such vessels with acentral or common source of heat, as steam or hotwater, whereby acontinuous infusion may be secured without interruption and in thesimplest and. most economical manner.

It also consists in such other novel construction and combination ofparts as are shown and described and as are particularly pointed out inthe claims.

In the drawings, A represents a vessel or urn of any preferred form orsize and of any suitable material, within which is positioned thesubstantially vertical tube 13. The tube B is provided with aheating-chamber O and also with means for admitting the fluid from thevessel A.as, for example, by a valve D, controlling the inlet.

A steam or hot-water drum E is so posi= tioned with relation to thechamber 0 that the contents of said chamber will be heated Withoutaffecting to any great extent the temperature in the vessel A, the pipe.e and return-pipe Q, Connected with any source of steam or hot Water,serving to conduct the heating medium to the drum for this purpose.

To prevent the heat from thedrum being transmitted to the vessel exceptthrough the tube B, I prefer to place'the heating-chamber outside thevessel, and either locate the drum a sufficient distance from the vesselto prevent such a result or interpo'se insulating material between thetwo. In the preferred construction both these methods are combined, asshown in the drawings.

F is a water-pipe, by means of which the fiuid may be replenished asnecessary, the valve f controlling the same, while the pipe G serves todraw off the infusion.

The upper part of the tube 13 connects with an elevated receptacle 1 1,provided on its bottom with Ipreferably slotted apertures it, throughwhich any fluid falling into the vessel II may escape to the body of thevessel A. A suitable cover H is provided for the vessel H, while thecover A serves a like purpose for the vessel A.

The mode of operation is as follows: A quantity of coffee or othersubstance from which the infusion to be made is placed in the vessel Hand the cover placed in position. A suitable quantity of water isadmitted to the vessel Asay to the line Ifilling the tube B to an equalheight and filling the chamber 0. Steam or hot water then being admittedcir culates freely about the vessel 0, heating the contents thereof andthat in the tube and causing the fluid to rise and overflow into thevessel H, from whence it percolates downward therein, escaping into thevessel A below. As the fluid overflows into the receptacle H thedeficiency in the tube B caused thereby is replaced by an equal quantityof the fluid in the vessel A passing by the valve D into the tube. Thusa free and efficient bestos, mineral wool, felt, or other preferredmaterial may be employed for this purpose. A cover K prevents the escapeof heat upward, while any fluid caused by condensation occurring abovethe cover A escapes to the downwardly-inclined joint 70, which may bepacked with some absorbent, as by a felt washer 7t. A water-gage L maybe employed to indicate the quantity of fluid or infusion in the vesselA.

Fig. 3 shows a top plan of the plate E, which forms the steam jacket ordrum, Fig. 2.

Fig. 4 shows the preferred valve mechanism controlling the passage ofthe fluid into the tube 13. In this form the valve D is held in place bygravity, controllingthe passage of the fluid through the opening d.

In the modification shown in Fig. 5 the steam-drum E is extended fartherup into the tube B, occupying a space near or above the valve D. If itextend well above the valve D, I find I can secure very fair results bydispensing with the valve D. The results are very inferior, however, tothose obtained by the use of a valve which prevents any escape whateverof the fluid in the tube into vessel A except by overflowing and passingthrough the receptacle H, as described.

Fig. 1 shows a very simple and effective as well as economical apparatusfor use where a supply of steam or hot water is not convenient and wherea large quantity of coffee or other infusion is used, as in a restaurantor similar place. In this form N represents a small steam or hot-watergenerator provided with a safety-valve or blow-off n, which may be setto blow off at any desired pressure. Water is supplied through the pipe0, the branch pipes O O 0 serving to supply the vessels or urns A A AThe steam generated is conducted to the vessels by the steam-pipes e 6 6while the return cooled and partially-condensed steam is through thepipes e e a Any medium may be employed to generate the steamgas,gasolene, or oil being preferred.

In the preferred use the vessel A is used simply for hot water, pipes 1919 serving to conduct hot water to either of the other vessels at will.By this means coffee can be quickly made, and when one vessel isexhausted it can be quickly shut off and replenished, while theremaining vessel supplies the demand. A superior quality of coifee orother infusion is thus obtained in a most simple and economical manner,and there is no interruption in the supply.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a device of the character described, the combination with a vesselhaving an elevated receptacle therein, of an upwardly-extendingelevating or circulating tube arranged to discharge into the receptacleand communicating at its lower end with the interior of the vessel, aheating-chamber without the vessel communicating with the tube, aheating-drum for the chamber applied directly thereto, insulatingmaterial between the drum and vessel, and means for supplying a heatingmedium to the drum.

2. In a device of the character described, the combination with a vesselhaving an elevated receptacle therein, of an upwardly-extendingelevating or circulating tube arranged to discharge into the receptacle,and communicating at its lower end with the interior of the vessel, aheating-chamber without the vessel communicating with the tube, aheating-drum applied to the chamber having one of its walls formed by awall of the chamber, and means for supplying a heating medium to thedrum.

3. In a device of the character described, the combination with a vesselhaving an elevated receptacle therein constructed to permit the escapeof fluids therefrom to the vessel, of an upwardly-extending elevating orcirculating tube arranged to discharge into the receptacle andcommunicating atits lower end with the interior of the vessel,aheatingchamber without the vessel communicating with the tube, aheating-drum for the chamber applied directly thereto, means forpreventing communicating heat from the drum direct to the vessel exceptthrough the tube, and means for supplying a heating medium to the drum,substantially as described.

, JOHN S. DUNLAP.

\Vitnesses:

J OI-IN W. HILL, L. A. GARDINER.

